Okay example: i currently remade the engine of the RUF Yellowbird (not uploaded yet) because the previous one was actually based on the Carrera 3.2 engine and ib the same family, BUT due to this had 2 valves per cylinder and just one ohc per bank insteaf of two like the real ctr. So i made a perfectly realistic engine (as far as automation goes) yesterday. Also the tire with etc was previously wider in order to get better grip. (as you might know, the ctr has a bit oversteer in rl). Or the 2017 CTR has extremely grippy tires to be driveable (and esc) but it isn't that realistic. So would you rather opt for realism or for driveability?
Considering this game is a simulator I would personally opt for realism Although it's all down to personal preference